Re: [ros-users] subscribeParam question in rospy

Oh, bummer. Is this functionality on the roadmap?

Would it be a reasonable substitute to have a global topic to notify for
config changes, which would allow the nodes to alert each other to re-check
the param server? Or am I overthinking the problem?

Mike



On 27 May 2010 18:54, Ken Conley <kwc@willowgarage.com> wrote:

> Hi Mike,
>
> This feature isn't available in rospy currently.
>
> - Ken
>
> On Thu, May 27, 2010 at 3:19 PM, Mike Purvis
> <mpurvis@clearpathrobotics.com> wrote:
> > Hey all,
> > I'm getting started on some work involving Parameter Server, and have a
> few
> > quick questions regarding the rospy interface.
> > According to the documentation of the XMLRPC API, there's a subscription
> > functionality that I'd like to take advantage of, to avoid polling for
> > configuration updates:
> > http://www.ros.org/wiki/ROS/Parameter%20Server%20API
> > The rospy overview docs don't seem to include this method.
> > http://www.ros.org/wiki/rospy/Overview/Parameter%20Server
> > However, looking at the source in paramserver.py, there's clearly the
> > following method defined:
> > def subscribe_param(self, key, registration_args)
> > But it's not clear what the "registration args" tuple is. It seems to end
> up
> > at the following call, inside masterdata.py:
> > def register_param_subscriber(self, param, caller_id, caller_api)
> > Is there an example somewhere of how to register the appropriate callback
> to
> > use subscribeParam from python?
> > Thanks,
> > Mike Purvis
> > _______________________________________________
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> > ros-users@code.ros.org
> > https://code.ros.org/mailman/listinfo/ros-users
> >
> >
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